I am using MacOSSierra 10.2.5. i uninstalled all older versions of source tree and trying to install source tree 2.5.2. When i install/open, i am getting error as "The source tree application you are running is less than the current version required. Please work to move to SourceTree version 2.5.1+. My OS still has reference to old version it seems, please let me know how to install the latest version?